High temperature and high humidity resistant polycarbonate composition and preparation method thereof

Abstract

The invention discloses a high temperature and high humidity resistant polycarbonate composition. In terms of a total of 100 weight parts, the raw materials include: 65-95 parts of polycarbonate; 0-20parts of a reinforcing component; 2-6 parts of a flame retardant; 0.2-0.5 part of an anti-dripping agent; 2-5 parts of a toughening agent; 0.2-1 part of a chain extender; and 0.1-2.5 parts of other additives. The toughening agent is selected from an organosilicon toughening agent, and the chain extender is selected from an oxazolinyl chain extender. The invention provides the high temperature andhigh humidity resistant polycarbonate composition, the prepared polycarbonate has excellent high temperature and high humidity resistance, and still has very high performance retention rate after 1000h of "double 85" (a humidity of 85% and a temperature of 85DEG C) hydrothermal aging, and can be applied to airtight basements and other occasions with high temperature and high humidity resistance requirements.

Description

technical field [0001] The invention relates to the field of polycarbonate materials, in particular to a high-temperature and high-humidity resistant polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate (PC) material is almost colorless and transparent amorphous polymer with good optical properties. As an engineering plastic with superior comprehensive performance, it is rigid and tough, with excellent impact performance, good dimensional stability and electrical insulation, so it is widely used in electrical appliances, automobiles, aviation, construction and other fields. PC material has excellent comprehensive properties, but it also has its own shortcomings, such as poor processability, low fatigue strength, prone to stress cracking, sensitive notch, poor wear resistance and solvent resistance, etc., which severely limit its application. [0003] The polycarbonate structure contains ester groups, which are sensitive gro...

AI Technical Summary

Problems solved by technology

However, polycarbodiimide is very expensive and contains a certain amount of weak alkalinity. During high-temperature extrusion processing, alkalinity will lead to the degradation of PC materials, which in turn will lead to a decline in the performance of PC materials. Therefore, polycarbodiimide Amines are commonly used as hydrolytic stabilizers for polyurethane materials, but rarely for polycarbonate materials

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